DESIGN OF MULTI-MODE AND MULTI-BAND MICROWAVE FILTER

A miniaturized microwave bandpass filter based on parallel connected multi-mode
network is presented in this thesis. This work demonstrates a new parallel connected
topology which is a combination of transversal arrays with multi-mode resonators.
The parallel connected network is commonly used to achieve higher order filter due to
its advantage of having flexibility of designing and tuning each resonator
independently When comparing '.vith com'entional parallel connected topology, the
significant difference is that each transversal path of the proposed topology can be
either using multi-mode resonator or a cascaded network of single-mode, dual-mode
or higher order mode resonator. The theory of this parallel connected multi-mode filter
has been developed together with the experimental prototypes.